UpHeron
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Servers and applications

CVE-2016-9932

CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.

Severity
Low 3.3
Published
26 Jan 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.4% in the next 30 daysHigher than 36% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Information exposure (CWE-200)
Attack
Needs local access · Needs a user account · No user action needed
Attacker can
Read some data
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
XenServers and applications · cpe:o:xen:xen
  • Version 4.7.0
  • Version 4.6.3
  • Version 4.6.0
  • Version 4.5.5
All 45 release lines
  • Version 3.3.0
  • Version 3.3.1
  • Version 3.3.2
  • Version 3.4.0
  • Version 3.4.1
  • Version 3.4.2
  • Version 3.4.3
  • Version 3.4.4
  • Version 4.0.0
  • Version 4.0.1
  • Version 4.0.2
  • Version 4.0.3
  • Version 4.0.4
  • Version 4.1.0
  • Version 4.1.1
  • Version 4.1.2
  • Version 4.1.3
  • Version 4.1.4
  • Version 4.1.5
  • Version 4.1.6
  • Version 4.1.6.1
  • Version 4.2.0
  • Version 4.2.1
  • Version 4.2.2
  • Version 4.2.3
  • Version 4.2.4
  • Version 4.2.5
  • Version 4.3.0
  • Version 4.3.1
  • Version 4.3.2
  • Version 4.3.3
  • Version 4.3.4
  • Version 4.4.0
  • Version 4.4.1
  • Version 4.4.2
  • Version 4.4.3
  • Version 4.4.4
  • Version 4.5.0
  • Version 4.5.1
  • Version 4.5.2
  • Version 4.5.3
  • Version 4.5.5
  • Version 4.6.0
  • Version 4.6.3
  • Version 4.7.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-9932
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-9932